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WO2016024625A1 - Verre feuilleté - Google Patents

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Publication number
WO2016024625A1
WO2016024625A1 PCT/JP2015/072914 JP2015072914W WO2016024625A1 WO 2016024625 A1 WO2016024625 A1 WO 2016024625A1 JP 2015072914 W JP2015072914 W JP 2015072914W WO 2016024625 A1 WO2016024625 A1 WO 2016024625A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
thickness
core layer
laminated glass
glass
Prior art date
Application number
PCT/JP2015/072914
Other languages
English (en)
Japanese (ja)
Inventor
神吉　哲
貴弘 浅井
Original Assignee
日本板硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本板硝子株式会社 filed Critical 日本板硝子株式会社
Priority to US15/503,959 priority Critical patent/US20170274738A1/en
Priority to EP15832562.1A priority patent/EP3181534A4/fr
Priority to CN201580043745.9A priority patent/CN106573837B/zh
Publication of WO2016024625A1 publication Critical patent/WO2016024625A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise

Definitions

  • This invention relates to the laminated glass used for the windshield of a motor vehicle.
  • Patent Document 1 describes a laminated glass for automobiles that maintains the sound insulation performance at a predetermined frequency while reducing the surface density. This laminated glass has a resin intermediate film disposed between a pair of glass plates.
  • FIG. 25 is a graph showing the result of simulating the relationship between frequency and sound transmission loss (STL).
  • laminated glass with a resin intermediate film sandwiched between two glass plates with thicknesses of 2.0 mm and 1.5 mm is used, and the vertical mounting angle is set to 5 types between 0 and 75 degrees. The result of setting and simulation is shown. According to this graph, it can be seen that when the mounting angle is larger than 45 degrees, the sound transmission loss is reduced in a frequency range of 2500 to 5000 Hz which is easy for humans to hear. Thereby, sound insulation performance falls and the problem that a vehicle interior environment deteriorates generate
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a laminated glass capable of suppressing a decrease in sound insulation performance even when the mounting angle is 45 degrees or more.
  • ⁇ Invention 1> The inventors of the invention 1 have conducted intensive studies in order to solve the above problems, and as a result, found that the sound insulation performance is improved as the Young's modulus of the core is smaller. In particular, when the mounting angle of the laminated glass is larger than 45 degrees, the sound insulation performance decreases at 2500 to 5000 Hz, particularly around 3150 Hz. When the Young's modulus of the core is decreased, the frequency at which the sound insulation performance is decreased by increasing the mounting angle. It was found that the sound insulation performance is improved in the same frequency range as the frequency range. Invention 1 has been completed as a result of further research based on these findings. That is, the invention 1 provides a laminated glass having the following aspects.
  • Item 1 Laminated glass used for automobile windshields, An outer glass plate, An inner glass plate disposed opposite to the outer glass plate; An intermediate film sandwiched between the outer glass plate and the inner glass plate; With The intermediate film includes at least a core layer and a pair of outer layers having higher rigidity than the core layer and sandwiching the core layer, For the automobile, the mounting angle from the vertical is 45 degrees or more, The laminated glass having a Young's modulus of the core layer of 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 2 The laminated glass according to Item 1, wherein the Young's modulus of the outer layer is 560 MPa or more at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 3. The laminated glass according to Item 1 or 2, wherein the inner glass plate has a thickness of 0.6 to 1.8 mm.
  • Item 4. The laminated glass according to any one of Items 1 to 3, wherein the outer glass plate has a thickness of 1.8 to 5.0 mm.
  • Item 5 The laminated glass according to any one of Items 1 to 4, wherein the core layer has a thickness of 0.1 to 2.0 mm.
  • Item 6 The laminated glass according to any one of Items 1 to 5, wherein the inner plate glass has a thickness smaller than that of the outer glass plate.
  • Item 7. The laminated glass according to any one of Items 1 to 6, wherein the attachment angle is 60 degrees or more.
  • Invention 2 The inventors of the invention 2 have conducted extensive studies in order to solve the above problems, and as a result, have found that the sound insulation performance improves as the thickness of the core layer increases. In particular, when the mounting angle of the laminated glass is larger than 45 degrees, the sound insulation performance decreases at 2500 to 5000 Hz, particularly around 3150 Hz. When the core layer thickness is increased, the frequency at which the sound insulation performance is reduced by increasing the mounting angle. It was found that the sound insulation performance is improved in the same frequency range as the frequency range. Invention 2 has been completed as a result of further research based on these findings. That is, Invention 2 provides a laminated glass having the following aspects.
  • Item 1 Laminated glass used for automobile windshields, An outer glass plate, An inner glass plate disposed opposite to the outer glass plate; An intermediate film sandwiched between the outer glass plate and the inner glass plate; With The intermediate film includes at least a core layer and a pair of aster layers having higher rigidity than the core layer and sandwiching the core layer, For the automobile, the mounting angle from the vertical is 45 degrees or more, The laminated glass whose thickness of the said core layer is 0.1 mm or more.
  • Item 2 The laminated glass according to Item 1, wherein the difference in thickness between the outer glass plate and the inner glass plate is 0.9 mm or more.
  • Item 3. The laminated glass according to Item 1 or 2, wherein the core layer has a Young's modulus of 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 4. The laminated glass according to any one of Items 1 to 3, wherein the inner glass plate has a thickness of 0.6 to 1.8 mm.
  • Item 5 The laminated glass according to any one of Items 1 to 4, wherein the outer glass plate has a thickness of 1.8 to 5.0 mm.
  • Item 6 The laminated glass according to any one of claims 1 to 5, wherein the core layer has a thickness of 0.1 to 2.0 mm.
  • Item 7. The laminated glass according to any one of Items 1 to 6, wherein the inner plate glass has a thickness smaller than that of the outer glass plate.
  • Item 8. The laminated glass according to any one of Items 1 to 7, wherein the attachment angle is 60 degrees or more.
  • Invention 3 As a result of intensive studies to solve the above problems, the inventors of the invention 3 have found that the sound insulation performance decreases as the curvature of the center line along the vertical direction of the laminated glass increases. Invention 3 has been completed as a result of further research based on these findings. That is, Invention 3 provides a laminated glass having the following aspects.
  • Item 1 Laminated glass used for automobile windshields, An outer glass plate, An inner glass plate disposed opposite to the outer glass plate; An intermediate film sandwiched between the outer glass plate and the inner glass plate; With The intermediate film includes at least a core layer and a pair of aster layers having higher rigidity than the core layer and sandwiching the core layer, The outer glass plate and the inner glass plate are curved, When the maximum distance between the straight virtual line connecting the center of the upper side and the center of the lower side of the inner glass plate and the inner glass plate is 20 mm or less, the mounting angle from the vertical is 45 with respect to the automobile.
  • the vehicle is mounted vertically Laminated glass having an angle of 30 degrees or less.
  • Item 2. The laminated glass according to Item 1, wherein the thickness of the outer glass plate is larger than the thickness of the inner glass plate.
  • Item 3. The laminated glass according to Item 1 or 2, wherein the core layer has a Young's modulus of 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 4. The laminated glass according to any one of Items 1 to 3, wherein the inner glass plate has a thickness of 0.6 to 1.8 mm.
  • Item 5 The laminated glass according to any one of Items 1 to 4, wherein the outer glass plate has a thickness of 1.8 to 5.0 mm.
  • Item 6. The laminated glass according to any one of Items 1 to 5, wherein the core layer has a thickness of 0.1 to 2.0 mm.
  • the figure is a graph showing the result of simulating the relationship between frequency and sound transmission loss (STL).
  • This graph is composed of laminated glass (hereinafter referred to as first laminated glass) composed of two glass plates having a thickness of 1.5 mm and different glass plates having thicknesses of 2.0 mm and 1.0 mm.
  • laminated glass hereinafter referred to as first laminated glass
  • second laminated glass Laminated glass
  • a resin intermediate film is disposed between two glass plates.
  • the sound transmission loss of the second laminated glass is lower than that of the first laminated glass in the frequency range of 3000 to 5000 Hz. That is, it was found that the use of glass plates having different thicknesses reduces the sound insulation performance in the frequency range of 2000 to 5000 Hz that is easy for humans to hear.
  • the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a laminated glass composed of glass plates having different thicknesses, which achieves both weight reduction and sound insulation.
  • the inventors of the invention 4 have intensively studied to solve the above problems, and as a result, they found that the sound insulation performance decreases as the difference in thickness between the outer glass plate and the inner glass plate increases. It has also been found that the sound insulation performance decreases as the curvature of the center line along the vertical direction of the laminated glass increases.
  • the invention 4 has been completed as a result of further research based on these findings. That is, the invention 4 provides a laminated glass having the following aspects.
  • Item 1 Laminated glass used for automobile windshields, An outer glass plate, An inner glass plate disposed opposite to the outer glass plate and having a smaller thickness than the outer glass plate, An intermediate film sandwiched between the outer glass plate and the inner glass plate; With The intermediate film includes at least a core layer and a pair of aster layers having higher rigidity than the core layer and sandwiching the core layer, The difference in thickness between the outer glass plate and the inner glass plate is 0.7 mm or less, The outer glass plate and the inner glass plate are curved, Laminated glass, wherein the maximum distance between a straight virtual line connecting the center of the upper side and the center of the lower side of the inner glass plate and the inner glass plate is 30 mm or less.
  • Item 2 The laminated glass according to Item 1, wherein the Young's modulus of the core layer is 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 3. The laminated glass according to Item 1 or 2, wherein the inner glass plate has a thickness of 0.6 to 1.8 mm.
  • Item 4. The laminated glass according to any one of Items 1 to 3, wherein the outer glass plate has a thickness of 1.8 to 5.0 mm.
  • Item 5 The laminated glass according to any one of Items 1 to 4, wherein the core layer has a thickness of 0.1 to 2.0 mm.
  • Inventors of the invention 5 as a result of intensive studies to solve the same problems as the invention 4, even if the thickness of the outer glass plate and the inner glass plate is different, the larger the thickness of the core layer, It has been found that the sound insulation performance is improved.
  • the invention 5 has been completed as a result of further research based on these findings. That is, the invention 5 provides a laminated glass having the following aspects.
  • Item 1 Laminated glass used for automobile windshields, An outer glass plate, An inner glass plate disposed opposite to the outer glass plate and having a smaller thickness than the outer glass plate, An intermediate film sandwiched between the outer glass plate and the inner glass plate; With The intermediate film includes at least a core layer and a pair of aster layers having higher rigidity than the core layer and sandwiching the core layer, The laminated glass whose thickness of the said core layer is 0.1 mm or more.
  • Item 2 The laminated glass according to Item 1, wherein the difference in thickness between the outer glass plate and the inner glass plate is 0.7 mm or less.
  • Item 3. The laminated glass according to Item 1 or 2, wherein the core layer has a Young's modulus of 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20 ° C.
  • Item 4. The laminated glass according to any one of Items 1 to 3, wherein the inner glass plate has a thickness of 0.6 to 1.8 mm.
  • Item 5 The laminated glass according to any one of Items 1 to 4, wherein the outer glass plate has a thickness of 1.8 to 5.0 mm.
  • Item 6. The laminated glass according to any one of Items 1 to 5, wherein the core layer has a thickness of 0.1 to 2.0 mm.
  • the present invention it is possible to provide a laminated glass capable of suppressing a decrease in sound insulation performance even when the mounting angle is large.
  • FIG. 1 is a cross-sectional view of a laminated glass according to the present embodiment.
  • the laminated glass according to the present embodiment is a laminated glass used for a windshield of an automobile, and includes an outer glass plate 1 disposed on the outer side of the vehicle and an inner glass plate 2 disposed on the inner side of the vehicle. And an intermediate film 3 sandwiched between these glasses.
  • the intermediate film 3 can be comprised by the core layer 31 and a pair of outer layer 32 which clamps this, this is an example and it mentions later for details.
  • each member will be described.
  • Outer glass plate and inner glass plate As the outer glass plate 1 and the inner glass plate 2, known glass plates can be used, and they can be formed of heat ray absorbing glass, general clear glass, green glass, or UV green glass. However, it is necessary to realize visible light transmittance in accordance with the safety standards of the country where the automobile is used. For example, the required solar radiation absorption rate can be secured by the outer glass plate 1, and the visible light transmittance can be adjusted by the inner glass plate 2 so as to satisfy the safety standard. Below, an example of a composition of clear glass, heat ray absorption glass, and soda-lime-type glass is shown.
  • the outer glass plate 1 has impact resistance performance against flying objects such as pebbles. is necessary.
  • the thickness of the outer glass plate 1 is preferably 1.8 mm or more, 1.9 mm or more, 2.0 mm or more, 2.1 mm or more, or 2.2 mm or more.
  • the upper limit of the thickness of the outer glass is preferably 5.0 mm or less, 4.0 mm or less, 3.1 mm or less, 2.5 mm or less, 2.4 mm or less. Among them, it is preferably larger than 2.1 mm and 2.5 mm or less, particularly preferably 2.2 mm or more and 2.4 mm or less.
  • the inner glass plate 2 can have the same thickness as that of the outer glass plate 1, but the thickness can be made smaller than that of the outer glass plate 1, for example, to reduce the weight of the laminated glass. Specifically, as will be described later, it is preferably in the range of 1.2 mm ⁇ 0.6 mm, which is easily affected by the frequency range of 2000 to 5000 Hz that is easy for humans to hear. Specifically, the thickness of the inner glass plate 2 is preferably 0.6 mm or more, 0.8 mm or more, 1.0 mm or more, 1.3 mm or more, and less than 1.1.
  • the upper limit of the thickness of the inner glass plate 2 is preferably 1.6 mm or less, 1.4 mm or less, 1.3 mm or less, and less than 1.1 mm. Among these, for example, 0.6 mm or more and less than 1.1 mm is preferable.
  • FIG. 2 is a graph in which sound transmission loss (STL: Sound Transmission Loss) is calculated under the following conditions (the calculation method follows the method of an embodiment described later).
  • the outer glass plate 1 and the inner glass plate 2 were flat clear glass having a width of 800 mm and a length of 500 mm.
  • the intermediate film 3 is composed of three layers in which the core layer 31 is sandwiched between a pair of outer layers 32.
  • the thickness of the core layer is 0.10 mm
  • the thickness of the outer layer is 0.33 mm
  • the total is 0.76 mm.
  • the Young's modulus (measured at a frequency of 100 Hz and a temperature of 20 ° C.) of the core layer 31 is 25 MPa
  • the Young's modulus of the outer layer 32 (measured at a frequency of 100 Hz and a temperature of 20 ° C.) is 441 MPa.
  • the specifications of the core layer 31 and the outer layer 32 are the same as described above unless otherwise specified.
  • clear glass is used, but is not limited thereto. This is because the sound insulation performance is determined by the Young's modulus, Poisson's ratio, and density of the glass, and clear glass and, for example, green glass have the same value.
  • the difference in thickness between the outer glass plate 1 and the inner glass plate 2 is preferably 0.7 mm or less, and more preferably 0.5 mm or less.
  • the shape of the outer glass plate 1 and the inner glass plate 2 according to the present embodiment may be either a planar shape or a curved shape.
  • the curved shape of the STL since the curved shape of the STL is lowered, the curved glass particularly requires an acoustic measure. The reason why the STL value is lower in the curved shape than in the planar shape is that the curved shape is more influenced by the resonance mode.
  • the double amount is an amount indicating the bending of the glass plate.
  • a virtual straight line S connecting the left and right centers of the glass plate that is, the center of the upper side and the center of the lower side is set.
  • the largest of the distances between the straight line S and the surface of the glass plate is defined as the double amount D.
  • FIG. 4 shows the result of simulating the relationship between the frequency and the STL at different doubling amounts.
  • the thicknesses of the outer glass plate 1 and the inner glass plate 2 are both 1.75 mm, and only the line connecting the upper and lower sides of both glass plates 1 and 2 is curved.
  • Other conditions are the same as those in the graph of FIG.
  • the STL decreases in a frequency range of 4000 Hz or less as the amount of doubling increases. In particular, when the amount of doubling is larger than 30 mm, the STL is significantly reduced.
  • the amount of doubling is preferably 30 mm or less, and more preferably 20 mm or less.
  • the difference in thickness between the glass plate 1 and the inner glass plate 2 is 0.7 mm or less and the amount of doubling is 30 mm or less.
  • a thickness gauge such as SM-112 manufactured by Teclock Co., Ltd. can be used.
  • Teclock Co., Ltd. a thickness gauge
  • it is arranged so that the curved surface of the glass plate is placed on a flat surface, and the end of the glass plate is sandwiched by the thickness gauge and measured. Even when the glass plate is flat, it can be measured in the same manner as when the glass plate is curved.
  • the intermediate film 3 is formed of a plurality of layers.
  • the intermediate film 3 is composed of three layers in which a soft core layer 31 having low rigidity is sandwiched between outer layers 32 having higher rigidity. can do.
  • it is not limited to this configuration, and it may be formed of a plurality of layers having the soft core layer 31.
  • two layers including the core layer 31 one core layer and one outer layer
  • an even number of layers including the core layer 31 inside the core layer is one layer and the other layers are outer layers.
  • the core layer 31 is not particularly limited as long as it is softer than the outer layer 32, but in this respect, the material can be selected based on the Young's modulus.
  • the Young's modulus of the core layer 31 is preferably 1 MPa or more and 25 MPa or less at a frequency of 100 Hz and a temperature of 20 degrees.
  • the upper limit is preferably 20 MPa or less, more preferably 16 MPa or less, and particularly preferably 10 MPa or less.
  • frequency dispersion measurement can be performed with a strain amount of 0.05% using a solid viscoelasticity measuring device DMA-50 manufactured by Metravib.
  • the Young's modulus is a value measured by the above method.
  • the measurement when the frequency is 200 Hz or less uses an actual measurement value.
  • a calculation value based on the actual measurement value is used. This calculated value is based on a master curve calculated by using the WLF method from the actually measured value.
  • the Young's modulus of the outer layer 32 is not particularly limited as long as it is larger than that of the core layer 31.
  • the upper limit of the Young's modulus of the outer layer 32 is not particularly limited, but can be set from the viewpoint of workability, for example. For example, it is empirically known that when it becomes 1750 MPa or more, workability, particularly cutting becomes difficult.
  • the tan ⁇ of the core layer 31 of the intermediate film 3 is preferably 0.5 to 3.0, more preferably 0.7 to 2.0, and more preferably 1.0 to 1.0 at a frequency of 100 Hz and a temperature of 20 degrees. A ratio of 1.5 is particularly preferred.
  • tan ⁇ is in the above range, sound is easily absorbed, and sound insulation performance is improved. However, if it exceeds 3.0, the intermediate film 3 becomes too soft and difficult to handle, which is not preferable. On the other hand, if it is less than 0.5, the impact resistance is lowered, which is not preferable.
  • tan ⁇ of the outer layer may be a value smaller than that of the core layer 31, and can be determined between 0.1 and 3.0 at a frequency of 100 Hz and a temperature of 20 degrees, for example.
  • the material constituting each of the layers 31 and 32 is not particularly limited, but it is necessary that the material has at least a Young's modulus in the above range.
  • a resin material can be used.
  • the outer layer 32 can be made of polyvinyl butyral resin (PVB). Polyvinyl butyral resin is preferable because it is excellent in adhesiveness and penetration resistance with each glass plate.
  • the core layer 31 can be made of an ethylene vinyl acetate resin (EVA) or a polyvinyl acetal resin softer than the polyvinyl butyral resin constituting the outer layer. By sandwiching the soft core layer between them, the sound insulation performance can be greatly improved while maintaining the same adhesion and penetration resistance as the single-layer resin intermediate film.
  • the hardness of the polyvinyl acetal resin is controlled by (a) the degree of polymerization of the starting polyvinyl alcohol, (b) the degree of acetalization, (c) the type of plasticizer, (d) the addition ratio of the plasticizer, etc. Can do. Therefore, by appropriately adjusting at least one selected from these conditions, even with the same polyvinyl butyral resin, a hard polyvinyl butyral resin used for the outer layer and a soft polyvinyl butyral resin used for the core layer It can be made separately.
  • the hardness of the polyvinyl acetal resin can also be controlled by the type of aldehyde used for acetalization, coacetalization with a plurality of aldehydes or pure acetalization with a single aldehyde. Although it cannot generally be said, the polyvinyl acetal resin obtained by using an aldehyde having a large number of carbon atoms tends to be softer.
  • the core layer has an aldehyde having 5 or more carbon atoms (for example, n-hexylaldehyde, 2-ethylbutyraldehyde, n-heptylaldehyde, n- Octyl aldehyde) can be used as a polyvinyl acetal resin obtained by acetalization with polyvinyl alcohol.
  • a predetermined Young's modulus it is not limited to the said resin.
  • the total thickness of the intermediate film 3 is not particularly limited, but is preferably 0.3 to 6.0 mm, more preferably 0.5 to 4.0 mm, and 0.6 to 2.0 mm. It is particularly preferred.
  • the thickness of the core layer 31 is preferably 0.1 to 2.0 mm, and more preferably 0.1 to 0.6 mm. In particular, the lower limit is preferably 0.1 mm or more, more preferably 0.15 mm or more, and particularly preferably 0.2 mm or more. If the thickness is smaller than 0.1 mm, the influence of the soft core layer 31 is difficult to be exerted, as will be described later, and if the thickness is larger than 2.0 mm or 0.6 mm, the total thickness increases and the cost increases.
  • the thickness of the outer layer 32 is not particularly limited, but is preferably 0.1 to 2.0 mm, and more preferably 0.1 to 1.0 mm.
  • the total thickness of the intermediate film 3 can be made constant, and the thickness of the core layer 31 can be adjusted therein.
  • FIG. 6 is a graph in which the relationship between the frequency and the sound transmission loss (STL) is calculated under the following conditions under different thicknesses of the core layer 31 (the calculation method follows the method of an example described later, the same applies hereinafter). It is.
  • the outer glass plate 1 and the inner glass plate 2 were flat clear glass having a width of 800 mm and a length of 500 mm.
  • the intermediate film 3 is composed of three layers in which the core layer 31 is sandwiched between a pair of outer layers 32, and the thickness of the outer layer is 0.33 mm.
  • the Young's modulus (measured at a frequency of 100 Hz and a temperature of 20 ° C.) of the core layer 31 is 25 MPa
  • the Young's modulus of the outer layer 32 is 441 MPa.
  • the STL increases as the frequency increases in the frequency range of 2000 to 5000 Hz.
  • the thickness of the core layer is less than 0.1 mm, the STL is lowered in the frequency range of 2000 to 5000 Hz. The reason is considered as follows.
  • the intermediate film 3 mainly has the properties of the hard outer layer 32. That is, the outer glass plate 1 and the inner glass plate 2 are connected by the hard intermediate film 3, and thus, even if it is a laminated glass, the total thickness of the outer glass plate 1 and the inner glass plate 2. As a single plate of the same thickness, the properties become stronger. Moreover, as shown in the following formula, the coincidence frequency generally shifts to a higher frequency side as the thickness and Young's modulus of glass become smaller.
  • the intermediate film 3 is hard, that is, if the Young's modulus is large, even if it is a laminated glass having a total thickness of 4 mm, the coincidence frequency is 3 as in the case of a single plate having a thickness of 4 mm. It becomes ⁇ 4 kHz, and the performance deteriorates in a frequency band that is easy for humans to hear.
  • the intermediate film 3 is soft, that is, if the Young's modulus decreases, the performance of the laminated glass is the sum of the two glass plates. For example, if it is a laminated glass consisting of a 2 mm glass plate and a 1 mm glass plate, its performance tends to be the sum of the performances of the two glass plates.
  • FIG. 7 is a graph which shows the result of having simulated the relationship between the frequency and STL of the single plate which is not a laminated glass.
  • the thickness of the core layer 31 constituting a part of the intermediate film 3 is increased, the influence of the soft core layer 31 is increased, and the laminated glass is provided 2 with the core layer 31 of the intermediate film 3 interposed therebetween.
  • the combined properties of the two glass plates appear.
  • the thickness of the outer side glass plate 1 and the inner side glass plate 2 is different, for example, even if the thickness of the inner side glass plate 2 is reduced, the sound insulation performance is not lowered at a frequency that is easy for humans to hear. That is, the coincidence frequency is shifted to the high frequency side by reducing the thickness of the inner glass plate 2.
  • the sound insulation performance in the frequency range of 2000 to 5000 Hz, it is necessary to increase the thickness of the soft core layer 31. As described above, if the difference in thickness between the outer glass 1 and the inner glass plate 2 is small, the sound insulation performance can be further improved.
  • the above knowledge relates to the thickness of the core layer 31 that is softer than the outer layer 32, the same effect can be obtained by setting the Young's modulus range of the core layer 31 as described above. it can.
  • the thickness of the core layer 31 can be measured as follows, for example. First, the cross section of the laminated glass is enlarged and displayed by 175 times using a microscope (for example, VH-5500 manufactured by Keyence Corporation). And the thickness of the core layer 31 is specified visually, and this is measured. At this time, in order to eliminate visual variation, the number of measurements is set to 5 times, and the average value is set as the thickness of the core layer 31. For example, an enlarged photograph of a laminated glass as shown in FIG. 8 is taken, and the core layer is specified in this and the thickness is measured. In addition, the thickness of the outer layer 32 can also be measured similarly.
  • the thickness of the intermediate film 3 does not have to be constant over the entire surface, and may be a wedge shape for laminated glass used for a head-up display, for example.
  • the thickness of the intermediate film 3 is measured at a portion having the smallest thickness, that is, the lowermost side portion of the laminated glass.
  • the outer glass plate 1 and the inner glass plate 2 are not arranged in parallel.
  • Such an arrangement is also included in the “opposing arrangement” between the outer glass plate and the inner glass plate in the present invention.
  • the “opposing arrangement” of the present invention includes an arrangement of the outer glass plate 1 and the inner glass plate 2 when the intermediate film 3 whose thickness is increased at a change rate of 3 mm or less per 1 m, for example.
  • the manufacturing method of the intermediate film 3 is not particularly limited, for example, after blending resin components such as the above-mentioned polyvinyl acetal resin, a plasticizer, and other additives as necessary, and uniformly kneading, each layer is collectively And a method of laminating two or more resin films prepared by this method by a pressing method, a laminating method or the like.
  • the resin film before lamination used in a method of laminating by a press method, a laminating method or the like may have a single layer structure or a multilayer structure.
  • the manufacturing method of the laminated glass which concerns on this embodiment is not specifically limited, The manufacturing method of a conventionally well-known laminated glass can be employ
  • the intermediate film 3 is sandwiched between the outer glass plate 1 and the inner glass plate 2, placed in a rubber bag, and pre-bonded at about 70 to 110 ° C. while sucking under reduced pressure.
  • Other methods can be used for the preliminary adhesion.
  • the intermediate film 3 is sandwiched between the outer glass plate 1 and the inner glass plate 2 and heated at 45 to 65 ° C. in an oven. Subsequently, this laminated glass is pressed by a roll at 0.45 to 0.55 MPa.
  • the laminated glass is again heated at 80 to 105 ° C. in an oven and then pressed again with a roll at 0.45 to 0.55 MPa.
  • preliminary adhesion is completed.
  • the pre-bonded laminated glass is subjected to main bonding by an autoclave at 8 to 15 atm and 100 to 150 ° C. Specifically, the main bonding can be performed under the conditions of 14 atm and 145 ° C. Thus, the laminated glass according to the present embodiment is manufactured.
  • the laminated glass described above is attached as a windshield to a vehicle by a frame such as a urethane frame, an adhesive, and a clamp.
  • a frame such as a urethane frame, an adhesive, and a clamp.
  • pins 50 are attached to both ends of the laminated glass 10, and the adhesive 60 is applied to the automobile frame 70 to be attached.
  • a through hole 80 into which a pin is inserted is formed in the frame.
  • the laminated glass 10 is attached to the frame 70.
  • the pin 50 is inserted into the through hole 80 and the laminated glass 10 is temporarily fixed to the frame 70.
  • the pin 50 is inserted only halfway through the through-hole 80, whereby a gap is generated between the frame 70 and the laminated glass 10. And since the adhesive material 60 mentioned above is apply
  • the attachment angle of the laminated glass 10 is preferably 45 degrees or less from the vertical N as shown in FIG.
  • the above-described doubling amount also contributes to suppressing a decrease in sound insulation performance at a frequency of 2000 to 5000 Hz, particularly around 3150 Hz.
  • the mounting angle is 45 degrees or less.
  • the mounting angle is preferably not greater than 30 degrees.
  • the attachment angle of the laminated glass may be larger than 45 degrees, and in that case, the sound insulation performance is lowered. Therefore, in order to suppress a decrease in sound insulation performance at a frequency of 2000 to 5000 Hz even when the mounting angle is large, as described above, the Young's modulus of the core layer 31 is reduced or the thickness of the core layer 31 is increased. It is preferable. In this way, it has been found that the sound insulation performance is improved in a frequency range in which the sound insulation performance is lowered by increasing the mounting angle, and in a frequency region almost the same. In this case, the outer glass plate 1 and the inner glass plate 2 may have the same thickness.
  • FIG. 10 is a graph showing the relationship between the frequency and STL at different core layer thicknesses when the mounting angle is 60 degrees. According to the figure, the STL at 2000 to 5000 Hz increases as the thickness of the core layer 31 increases, but the STL decreases at 5000 to 8000 Hz.
  • FIG. 11 is a graph showing the relationship between the frequency and the STL when the mounting angle is 60 degrees and the thickness of the core layer 31 is 0.1 mm. And in this graph, the three types of laminated glass from which the thickness of the outer side glass plate 1 and the inner side glass plate 2 differs was prepared.
  • the STL of the laminated glass having the largest difference in thickness between the outer glass plate 1 and the inner glass plate 2 is the lowest, there is no great difference from other laminated glasses.
  • the STL of the laminated glass having the large thickness difference between the outer glass plate 1 and the inner glass plate 2 is the largest.
  • the difference in thickness between the outer glass plate 1 and the inner glass plate 2 is large, for example, preferably larger than 0.9 mm, larger than 1.5 mm. More preferably, this has been found to improve the STL of 5000-8000 Hz.
  • FIG. 12 is a graph showing the relationship between STL and frequency in Young's modulus of different core layers when the mounting angle is 60 degrees, the thickness of the outer glass plate is 2.0 mm, and the thickness of the inner glass plate is 1.5 mm. It is. As can be seen from the figure, the STL at 2000 to 5000 Hz increases as the Young's modulus of the core layer 31 decreases, but the STL decreases at 5000 to 8000 Hz.
  • FIG. 13 is a graph showing the relationship between the frequency and STL when the mounting angle is 60 degrees and the Young's modulus of the core layer 31 is 10 MPa (frequency 100 Hz, temperature 20 degrees).
  • the thickness of the outer layer 32 was 441 MPa, 560 MPa, and 800 MPa.
  • the STL is the lowest when the Young's modulus of the outer layer is large, there is no significant difference from other laminated glasses.
  • the STL of the laminated glass having a large Young's modulus of the outer layer 32 is the largest.
  • the outer layer 32 has a large Young's modulus, for example, 560 MPa or more, whereby the core layer 31 has a Young's modulus of, for example, 1 to It was found that the STL of 5000 to 8000 Hz is improved even when the pressure is as low as 25 MPa.
  • each laminated glass includes an outer glass plate, an inner glass plate, and an intermediate film sandwiched between them.
  • the thicknesses of the core layer and the outer layer were 0.1 mm and 0.33 mm, respectively, and the Young's modulus was 10 MPa and 441 MPa (20 ° C., 100 Hz), respectively.
  • the above laminated glasses were arranged at an angle of 60 degrees from the vertical, and granite having an average particle diameter of about 5 to 20 mm was collided with each laminated glass at a speed of 64 km / h. Thirty granites collided with each laminated glass, and the occurrence rate of cracks was calculated. The result is as shown in FIG. As shown in the figure, in the laminated glasses 1 to 5 having an outer glass plate thickness of 2.0 mm or more, the occurrence rate of cracks was 5% or less regardless of the thickness of the inner glass plate. On the other hand, in the laminated glasses 6 and 7 having a thickness of the outer glass plate of 1.8 mm or less, the occurrence rate of cracks was 8% regardless of the thickness of the inner glass. Therefore, from the viewpoint of impact resistance against flying objects, the thickness of the outer glass plate is preferably 1.8 mm or more as described above. More preferably, it is 2.0 mm or more.
  • Simulation method for sound transmission loss> For the following Examples and Comparative Examples, sound transmission loss was evaluated by simulation. The simulation conditions are as follows. This simulation method is also used in the above-described embodiment.
  • the simulation was performed using acoustic analysis software (ACTRAN, manufactured by Free Field technology).
  • ACTRAN acoustic analysis software
  • the sound transmission loss (transmitted sound pressure level / incident sound pressure level) of the laminated glass can be calculated by solving the following wave equation using the finite element method.
  • Model setting The model of the laminated glass used in this simulation is shown in FIG.
  • a laminated glass is defined in which an outer glass plate, an intermediate film, an inner glass plate, and a urethane frame are laminated in this order from the sound source side.
  • the reason why the urethane frame is added to the model is that there is a considerable influence on the calculation result of sound transmission loss due to the presence or absence of the urethane frame, and between the laminated glass and the vehicle windshield. This is because it is generally considered that a urethane frame is used and bonded.
  • Input condition 1 (dimensions, etc.)
  • the size of the glass plate 800 ⁇ 500 mm
  • the STL value tends to deteriorate. This is because, as the size increases, the constrained portion increases and the resonance mode increases accordingly.
  • the tendency of the relative value for each frequency that is, the laminated glass made of glass plates with different thicknesses becomes worse in a predetermined frequency band than the laminated glass made of glass plates with the same thickness. The trend is the same.
  • the mesh formed on the glass plate was a rectangular parallelepiped having a side of 5 mm. This is generally said to be accurate if it is 1/6 or less of the maximum wavelength to be analyzed, and 5 mm used this time corresponds to about 1/7 of the wavelength at 10000 Hz. Therefore, the accuracy of simulation is guaranteed. Therefore, please note that accuracy is guaranteed.
  • the random diffuse sound wave in Table 2 is a sound wave having a predetermined frequency that propagates at an incident angle in any direction with respect to the outer glass plate, and a sound source in a reverberation chamber for measuring sound transmission loss. It is assumed.
  • the plane wave is a wave having a wavefront perpendicular to a certain traveling direction, and a sound wave having a predetermined frequency is incident on the outer glass plate and propagates perpendicularly.
  • the effect of the sound insulation performance can be evaluated even using a plane wave.
  • Results are as shown in FIG. 16 and FIG.
  • FIG. 16 As shown in FIG. 16, as shown in Comparative Examples 1, 2, 5, and 6, it can be seen that the STL decreases as the double amount increases.
  • Comparative Examples 1 and 2 it can be seen that when the amount of doubling is large, the STL is lowered even if the difference in thickness between the outer glass plate and the inner glass plate is small.
  • Comparative Examples 3 and 4 it can be seen that even if the amount of doubling is small, if the difference in thickness between the outer glass plate and the inner glass plate is large, the STL is lowered particularly at 3000 Hz or higher.
  • the STL increases as the core layer thickness increases even when the mounting angle is as large as 45 degrees or more. That is, as shown in FIG. 25, the STL is improved as the thickness of the core layer is increased in the same frequency range of 2000 to 5000 Hz (especially around 3150 Hz) where the STL is reduced by increasing the mounting angle. I found out. Moreover, it turned out that it is the same performance, even if the thickness of a glass plate is the same as shown in FIG.
  • Results are as shown in FIG. It can be seen that even when the mounting angle is as large as 45 degrees or more, the STL increases as the Young's modulus of the core layer decreases. That is, as shown in FIG. 25, the STL improves as the Young's modulus of the core layer decreases in the same frequency range of 2000 to 5000 Hz (especially around 3150 Hz) where the STL is reduced by increasing the mounting angle. I found out.
  • the results are as shown in FIGS. First, as shown in FIG. 23, it was found that when the amount of double was 0 to 20 mm, the STL was 20 dB or more at all frequencies if the mounting angle was 45 degrees or less. On the other hand, when the amount of doubling is larger than 20 mm, it can be seen that even when the mounting angle is 45 degrees, the STL is greatly reduced. For example, in Comparative Examples 15 and 16, the STL is less than 20 dB at a frequency of 2000 to 3000 Hz, and in Comparative Example 17, the STL is the lowest at a frequency of 3000 to 5000 Hz. Therefore, it was found that when the amount of double is 0 to 20 mm, the mounting angle is preferably 0 to 45 degrees.
  • the mounting angle is preferably 30 degrees or less.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

La présente invention porte sur un verre feuilleté destiné à être utilisé pour des pare-brise d'automobiles, comprenant une plaque de verre externe ; une plaque de verre interne située à l'opposé de la plaque de verre externe et ayant une épaisseur plus petite que la plaque de verre externe ; et un film intermédiaire pris en sandwich entre la plaque de verre externe et la plaque de verre interne ; le film intermédiaire étant pourvu d'au moins une couche centrale et d'une paire de couches externes présentant une rigidité supérieure à la couche centrale et prenant en sandwich la couche centrale ; le verre feuilleté étant installé sur l'automobile à un angle d'au moins 45° par rapport à la verticale ; et la couche centrale ayant un module d'Young de 1 à 25 MPa à une fréquence de 100 Hz et une température de 20°C.
PCT/JP2015/072914 2014-08-15 2015-08-13 Verre feuilleté WO2016024625A1 (fr)

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CN108342999A (zh) * 2018-03-01 2018-07-31 刘宇 一种用于高架桥的环保降噪装置
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CN106573837A (zh) 2017-04-19
CN106573837B (zh) 2020-10-27

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